TW587143B - Air conditioner control system and control method thereof - Google Patents

Abstract

Disclosed is an air conditioner including an outdoor unit and a plurality of indoor units. The outdoor unit has a compressor and condenser, and an accumulator provided to a low-pressure conduit of the compressor's upper stream and a receiver provided to a high-pressure conduit of the condenser's lower stream. The outdoor unit includes the compressor, a PWM valve, and an outdoor control unit connected to the compressor and the PWM valve for data transmission and reception. The outdoor control unit is connected to an outdoor communication circuit unit for data transmission and reception. Each indoor unit includes an indoor control unit, and this indoor control unit's input port is connected to a temperature detecting part and a temperature setting part. Each indoor unit includes an indoor communication circuit unit connected to the indoor control unit. Each indoor control unit calculates a required cooling capacity of each indoor unit on the basis of the cooling capacity of the unit itself and the difference between an actual indoor temperature and a preset temperature upon receipt of signals from the temperature detecting part and the temperature setting part. The calculated cooling capacity for each indoor unit is transmitted to the outdoor control unit through the communication circuit unit. The outdoor control unit computes the totally required cooling capacity obtained by adding all the required cooling capacities of the indoor units, and produces a duty cycle control signal and then controls the compressor and the PWM valve.

Description

587143 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Invention Description (丨) The present invention relates to an air conditioner, and in particular to a pulse width modulation compressor for controlling the overheating degree of the air conditioner System and its control method. [Knowledge technology] Under the effect of the refrigeration cycle, an air conditioner can control the characteristics such as room temperature and humidity of a house or building. The air conditioner generates conditioned air. However, for those who live and work in the building, each person will not have exactly the same indoor conditions as each other, and the circumstances outside the house will change. The amount of refrigeration required will also change frequently. In addition, in a multi-air conditioner with one of the indoor cooling units, the indoor cooling unit is connected to a single outdoor compression / condensing unit, and each indoor unit The amount of refrigeration required is different from each other. However, in most cases, each indoor unit has its own operation mode, so the total cooling capacity obtained by adding the required cooling capacity of each indoor unit cannot be evaluated according to the existing method. . A variable rotation number compressor is capable of adjusting the amount of cooling according to a variable cooling demand. In the variable revolution type compressor, the load of the compressor can be adjusted according to the variation of the required cooling capacity. The method is to use an inverter control manner. To change the frequency of the current acting on the motor, so that you can control the motor -------- II --------- (Please read the precautions on the back before filling this page) 587143 Economy Printed by A7 B7_____ of the Intellectual Property Cooperative of the Ministry of Intellectual Property Bureau V. The number of revolutions of the invention description (2). However, since the motor is controlled directly based on the required cooling capacity, the motor in the variable speed compressor cannot operate at the required response time / speed and accuracy. In addition, as the number of revolutions of the motor changes frequently, vibrations and voices are generated, which will reduce the life span of the motor and the compressor and reduce the overall mechanical reliability. In addition, the circuit device necessary for the variable revolution type compressor is an expensive device with a complicated structure, and the variable revolution type compressor can change the frequency of the current applied to the motor by a large power consumption. The performance of the variable speed compressor will be significantly lower than that of a general compressor. More specifically, in the variable speed compressor, the input commercial AC power must be converted into DC power first, and the DC power is converted into a converter with the required frequency by converters. With AC power, the structure of the circuit device of the variable speed compressor becomes quite complicated, and noise is often generated in the circuit device. In addition, the variable speed compressor of the large load type has problems such as difficulty in controlling the compressor, low efficiency of the compressor, excessive size of the compressor, and excessive cost of the compressor, etc. Compressors are not suitable for operations with large loads. Generally speaking, the operation under the heavy load condition is mostly completed by using two or more compressors, and in this example, the variable revolution type compressor and the standard compressor are used at the same time, among which, The motor used in this standard compressor rotates at a feed rate. When multiple compressors are used, the overall size of the outdoor unit is increased, which makes it difficult to perform operations on the outdoor unit. -------- ^ --------- ^ (Please read the precautions on the back before filling out this page) 6 587143 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Invention Description ( 3) In U.S. Patent No. 6,047,557, Japanese Unexamined Patent Publication No. Hei 8-334094, a pulse width modulated compressor is disclosed. The compressors used by households in these cold-kang systems include multiple freezing compartments or refrigerating compartments, and the above-mentioned design is used to shorten the piping in the cold-bundle system. ), Where the refrigerant conduits between the compressor and the evaporator have a relatively short distance. Because the long-distance pipes must be used in the air-conditioning systems of buildings, and the control environment between these air-conditioning systems and refrigeration systems is different, these compressors cannot be used in the air-conditioning systems of these buildings. . In addition, in the conventional technology, in addition to the related disclosure of the control system and control method of the pulse width modulation compressor in the air conditioner, the conventional technology does not propose the overheating of the multiple air conditioner. Degree of control. In view of this, the object of the air conditioner control system and control method of the present invention is to improve the conventional technology. The object of the present invention is to use a pulse width modulation compressor in the air conditioner control system and its control method, so that the calculated required cooling amount of each indoor unit can be transmitted to the outdoor unit, and by This method can be effectively applied to the air-conditioning operation of large plastic buildings with relatively long distances. Another object of the present invention is to calculate the required cooling amount for the required cooling amount of each indoor unit in the air conditioner control system and control method thereof, and by transmitting the calculated cooling amount to an outdoor unit In order to calculate the required total cooling capacity of the outdoor unit, the load of the pulse width modulation compressor is effectively changed according to the calculated total cooling capacity system 4. -------- ^ --------- (Please read the notes on the back before filling this page)

X 297 mm) 587143 A7 ___ B7 V. Description of the invention (4) (Please read the precautions on the back before filling out this page) Another object of the present invention is to use the air conditioner control system and its control method with A pulse width modulation compressor and one of the refrigeration cycles of a plurality of evaporators, thereby being designed to be effectively applied to buildings that must be air-conditioned. To achieve the above object, the present invention proposes an air conditioner control system. The air conditioner control system includes a compressor, a condenser, a plurality of indoor units, a plurality of indoor control units, and an outdoor control unit. The compressor is set in an outdoor unit, and the compressor is controlled by a pulse width modulation method. The condenser is connected to the compressor for fluid flow, and each indoor unit is provided with an evaporator, and the evaporator is connected to the compressor and the condenser for fluid flow. The control units in each house are used to calculate the required cooling capacity of the units in each house. The outdoor control unit generates a working control signal according to the required cooling amount transmitted by each indoor control unit, and the outdoor control unit controls the load of the compressor according to the working control signal. According to another feature of the present invention, it is known that the air conditioner control system provided by the present invention includes a compressor, a condenser, a plurality of evaporators, a plurality of temperature sensors, and a control device. unit. The compressor has two states, the two states are respectively opposite to two different loads, and the compressor can be operated in one of the two states in an alternative manner when power is applied. The condenser is connected to the compressor for fluid flow. Each evaporator is connected to the compressor and the condenser for fluid flow. The temperature sensor is used to sense the indoor temperature of a room for air conditioning. The control unit calculates the required cooling amount based on a difference between a detected indoor temperature and a preset temperature. The preset temperature is a required indoor temperature for air conditioning the room. In order to generate a work control signal and a function to calculate the cooling capacity, 8 paper sizes are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 public love), the description of the invention (5) shrinking machine and the preset temperature The load is controlled according to the working chirp signal. According to yet another feature of the present invention, it can be known that an air conditioning control system provided by the present invention includes a compressor and a control unit. The compressor is controlled by a pulse width modulation method, and the control unit is used to generate- A working cycle control signal f, the working cycle control signal is a function transmitted by each unit in the house; a function of the cold section 篁 and the control unit is based on the jade working cycle control signal to control the load of the shrinking machine. According to another feature of the present invention, it can be known that the air conditioner system in the control method of the air conditioner provided by the present invention includes an outdoor unit having a pulse width modulation compressor and a plurality of indoor units. Each of the indoor unit systems has a Evaporator's method of air work includes the steps of τ .... Under the control of each unit in the house, calculate the required cooling amount of each unit in the house; send the calculated required cooling rate to the honesty An external unit; summing up the amount of financial cooling from each indoor unit under the control of the outdoor unit; and generating a work control signal and controlling the load of the compressor according to the work control signal, the work control signal is Is a function of all this required cooling capacity. According to another feature of the present invention, it can be known that the financial control method of the air conditioner proposed in the present invention includes a outdoor unit with a pulse width modulation compressor and a plurality of evaporators, each of which is disposed at Air conditioning is performed in a plurality of rooms, and the method of controlling the air conditioner includes the following steps: sensing the temperature in the room for each room where the air conditioner is connected; obtaining the difference between the temperature in the room and a preset temperature The preset temperature is the temperature inside the room required to air-condition one of the rooms; based on the difference, a required cooling is calculated. 587143 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. And generating a work control signal to control the load of the compressor according to the work control signal, the work control signal is a function of all the required cooling amounts calculated in the above steps. Brief Description of the Drawings The first diagram is a schematic diagram showing a cold cycle of a refrigerating cycle of an air conditioner control system according to the present invention, and the second diagram is a pulse wave of the air conditioner A cross-sectional view of a pulse-width modulated compressor in a loading state; FIG. 2b shows the pulse-width modulated compressor in the air conditioner Sectional view in an unloading state; Figure 3 shows the compressor's loaded state, the unloaded state, and a refrigerant during the operation period of the compressor shown in Figures 2a and 2b. Figure 4 shows the relationship between the discharge volume; Figure 4 shows the overall block diagram of the air conditioner control system according to the present invention; Figure 5 is a graphical representation of the actual indoor temperature and A compensation coefficient is a difference between preset temperatures. The compensation coefficient is applied to the air conditioner control system and The control method; Figure 6a is a flowchart showing the control process performed in the indoor control unit of the present invention; and 10 paper sizes are applicable to China National Standard (CNS) A4 (210 X 297) Public love) -------- Order --------- line (please read the note on the back? Matters and then fill out this page) 587143 Printed and invented by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Explanation (7) FIG. 6b is a flowchart showing a control process performed in the outdoor control unit of the present invention. Description 1 ~ Air conditioner; 10 ~ Pressure accumulator; 12 ~ Ventilation bypass duct; 13 ~ Ventilation valve; 15 ~ Liquid bypass duct; 16 ~ Hot gas valve 18 ~ Inlet; 20 ~ Housing; 23 ~ Compression chamber; 25 ~ bypass duct; 28 ~ outdoor communication circuit early element, 3 ~ condenser; 30 ~ temperature detection unit 32 ~ indoor communication circuit unit; 5 ~ evaporator; 6 ~ high pressure duct 8 ~ outdoor unit; 9 ~ indoor unit . EXAMPLES In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below and described in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a refrigeration cycle of an air conditioner control system according to the present invention. The air conditioner of the present invention includes a compressor, a condenser 3, a plurality of electronic expansion valves 4 and a plurality of evaporators 5 and 11 ~ Collector; 14 ~ hot gas bypass conduit; 17 ~ liquid valve; 2 ~ compressor; 22 ~ swivel scroll; 24 ~ stationary scroll; 26 ~ PWM valve, 27 ~ outdoor control unit, 29 ~ Control unit in the house; 31 ~ temperature setting unit; 4 ~ electronic expansion valve; 7 ~ low pressure conduit; 19 ~ outlet; 21 ~ motor; __11 Kuni New Standard® (CNS) A4 specification (210 X 297)

-------- Order --------- f Please read the notes on the back before filling out this page} 587143 A7 B7 V. Description of the invention (8) The borrowing between the previous and the following devices A closed refrigerating circuit is formed by the connection of multiple refrigerating conduits. Among these cold bead conduits, one of the cold bundle agent conduits used to connect the outflow side of the compactor 2 to the inflow side of the electronic expansion valve 4 is a high-profile conduit ( high pressure conduit) 6, through which the high-pressure refrigerant discharged from the compressor 2 can be guided; used to connect the outflow side of the electronic expansion valve 4 to the inflow side of the compressor 2 A refrigerant conduit is a 10w pressure conduit 7 through which the low-pressure refrigerant expanded through the electronic expansion valve 4 is guided. The condenser 3 is disposed above the high-pressure duct 6, and the evaporator 5 is disposed above the low-pressure duct 7. When the compressor 2 is in operation, the refrigerant flows in solid arrow directions. 0 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In addition, the air conditioner 1 series includes an outdoor unit (outdoor unit ) 8 and a plurality of indoor units 9, wherein the outdoor unit 8 is mainly composed of the compressor 2 and the condenser 3. In addition, the outdoor unit 8 further includes an accumulator 10 and a receiver 11, where 'the accumulator 10 is arranged upstream of the low-pressure pipe 7 of the compressor 2 and is collected by 4 The condenser 11 is disposed downstream of the high-pressure duct 6 of the condenser 3. The function of the pressure accumulator 10 is to collect the liquid refrigerant that has not been evaporated and to evaporate it, and to allow the evaporated refrigerant to flow to the compressor 2. If the cold head in the evaporator 5 has not completely evaporated, the refrigerant entering the pressure accumulator 10 is a liquid-gas refrigerant. After evaporating the liquid cooling agent through the accumulator 10, the gaseous cooling agent (cold bead gas is applicable to this paper size medium size ⑽ 12 x 297 mm) printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs System 587143 A7 --B7 5. The description of the invention (9) (refrigerant gas)) is allowed to enter the compressor 2. In order to achieve the above purpose, the inlet and outlet ends of the refrigerant pipe located inside the pressure accumulator 10 are preferably placed on the upper portion of the pressure accumulator 10. If the refrigerant in the condenser 3 is not completely condensed, the refrigerant entering the collector 11 is a liquid-gas refrigerant. The purpose of the collector is to separate the liquid refrigerant from the gaseous refrigerant, so that only the liquid refrigerant in the liquid-gas mixed refrigerant can be discharged. In order to achieve this, the inlet and outlet ends of the refrigerant duct located inside the collector 11 are preferably extended to the lower portion of the collector 11. A vent bypass conduit 12 connects the collector 11 to the upstream of the low-pressure conduit 7 of the pressure accumulator 10, so that the gaseous refrigerant collected in the collector 11 can be carried out. Bypass drainage. The inlet end of the ventilation bypass duct 12 is located on the top of the collector 11 so that only the gaseous refrigerant can enter the ventilation bypass duct 12. A vent valve 13 is provided on the ventilation bypass duct 12, and the flow rate of the gaseous refrigerant bypassed and drained is controlled by the vent valve 13. Double dotted arrows indicate the flow direction of the gaseous refrigerant flowing through the ventilation bypass duct 12. A part of the high-pressure duct 6 extending from the collector 11 passes through the pressure accumulator 10, so that the refrigerant having a relatively high temperature can pass through the high-pressure duct 6 to have a low temperature in the pressure accumulator 10 The liquid refrigerant is evaporated. In order to effectively evaporate the liquid refrigerant, a part of the structure of the low-pressure duct 7 in the pressure accumulator 10 adopts a U-shaped structure. 13 This paper is a national standard (CNS) A4 specification (210 X 297 public love) -------- Order --------- line " 41 ^ " (Please read the precautions on the back before filling this page) 587143 A7

V. Description of the invention (1 ()) 'And the partial structure of the south pressure conduit 6 passing through the accumulator 10 is positioned inside the U-shaped portion passing through the low pressure conduit 7. In addition, the outdoor unit 8 further includes a hot gas bypass conduit 14 and a liquid bypass conduit 15, wherein the hot gas bypass conduit 14 is used to compress the hot gas bypass conduit 14. The high-pressure pipe 6 between the machine 2 and the condenser 3 is partially connected to the pressure accumulator 10, and the liquid bypass pipe 15 is used to connect downstream of the collector 11 and upstream of the pressure accumulator 10 . A hot gas valve 16 is provided on the hot gas bypass pipe 14. The hot gas valve 16 is used to control the flow rate of the hot gas to be bypassed, and the hot gas bypass pipe 14 is provided on the hot gas bypass pipe 14. A liquid valve 17 is provided to control the flow rate of the liquid refrigerant to be bypassed by the liquid valve 17. Therefore, when the hot gas valve 16 is in an open state, part of the hot gas discharged from the compressor 2 moves along the hot gas bypass duct 14 in the direction of the dotted arrow in FIG. 1. ; When the liquid valve 17 is in an open state, a portion of the liquid refrigerant discharged by the collector 11 moves along the liquid bypass conduit 15 in the direction of the double-pointed arrow in FIG. 1. The above-mentioned plural indoor units 9 are arranged in parallel, and each of the indoor units 9 includes an electronic expansion valve 4 and an evaporator 5. Therefore, a plurality of indoor units 9 are connected to the outdoor unit 8, and the capacity and shape of each indoor unit 9 can be completely consistent or performed in other ways. Each compressor 2 shown in Figs. 2a and 2b is a variable capacity compressors that can be controlled in a pulse width modulation manner. Each compressor 2 series includes a 14 paper size applicable to China National Standard (CNS) A4 specifications (210 X 297 public love) (Please read the precautions on the back before filling this page) f Order -------- -Line · Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 587143 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7___ V. Description of the Invention (11) Casing 20, Motor 21, Rotary A rotating scroll 22 and a stationary scroll 24. Among them, an inlet 18 and an outlet 19 are formed on the casing 20, and the motor 21 is disposed on the housing 20. In the casing 20, the orbiting scroll 22 is rotated by the turning force of the motor 21, and a compression chamber is defined by the stationary scroll 24 and the orbiting scroll 22 at the same time ( compressing chamber) 23. A bypass duct 25 is attached to the casing 20, and a position (outlet side) located above the stationary scroll 24 is connected to the inlet by the bypass duct 25. 18, and a PWM valve (Pulse Width Modulated Valve) 26 is installed on the bypass conduit 25, wherein the PWM valve 26 is a solenoid valve. In Fig. 2a, the PWM valve 26 is in the closed state, the bypass duct 25 is closed by the PWM valve 26, and the refrigerant is discharged by the compressor 2 series. This state is called a "loading state", in which the compressor 2 is operated at a load of 100%. In FIG. 2b, the PWM valve 26 is in an ON state, and the bypass duct 25 is opened by the PWM valve 26. At this time, the compressor 2 does not discharge the refrigerant. This state is called an "unloading state", in which the compressor 2 is operated at a load of 0%. Whether in a loaded state or an unloaded state, the electric power is supplied to The compressor 2 and the motor 21 are rotating at a constant speed. When the power supply of the compressor 2 is stopped, the motor 21 is stopped and the compressor 2 is also stopped. As shown in FIG. 3 The compressor 2 is under load and non-load state in weeks. -------- Order --------- Line (Please read the precautions on the back before filling this page) 15 587143 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Invention Description (12) Periodic operation, in which the load and non-load time are changed according to the required cooling capacity. The load bears Since the compressor 2 discharges the refrigerant, the temperature of the generator 2 will continue to drop during the load time; under no-load conditions, the compressor 2 is not for cold; Discharge, so that the temperature of the evaporator 5 Will continue to increase during the load time. In Figure 3, the section (hatctJd portions) indicates the amount of discharged refrigeration, and the signals used to control the load and non-load time are called duty control signals. It can be known in the preferred embodiment of the present invention that 'because the load and non-load time are changed according to the total cooling capacity required by the compressor 2', then the load of the compressor 2 is changed according to this method, for example : Each cycle is maintained at 20 minutes. Figure 4 shows the overall block diagram of the air conditioner control system according to the present invention. In Figure 4, the outdoor unit 8 includes an outdoor control unit (outdoor control unit) unit 27, where the outdoor control unit 27 is connected to the compressor 2 and the P WM valve 26, so that signals can be transmitted by the outdoor control unit 27. In addition, the outdoor control unit 27 is connected to An outdoor communication circuit unit 28 is used to transmit and receive related signals through the outdoor communication circuit unit 28. The internal unit 9 includes an indoor control unit 29. A temperature detecting unit 30 and a temperature setting unit 31 are connected to the input of the indoor control unit 29. ( input port), and the electronic expansion valve 4 is connected to the output port of the indoor control unit 29. The temperature detection 16 MM scale is applicable to China National Standard (CNS) A4 specifications (210 X 297 mm -------- order --------- (Please read the precautions on the back before (Fill in this page) 587143 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Description of the invention (13) The measuring unit 30 is a temperature sensor. The temperature detecting unit 30 detects The indoor temperature of a room (ro0m) of the air conditioner is performed, and the required cooling amount of the room can be calculated according to the temperature sensed by the temperature detection unit 30. The above is used to perform the pressure on the refrigerant The pressure sensor for pressure measurement can also be replaced by a temperature sensor. Such temperature and pressure sensors are load sensors, and these temperature and pressure sensors can be calculated. The required cooling capacity of each indoor unit, that is, the load of each indoor unit. Each indoor unit 9 series includes an indoor communication circuit unit 32, wherein the indoor communication circuit unit 32 is connected to a 1. indoor control unit control unit) 29 and the outdoor unit 8 so that related signals can be transmitted and received by the indoor communication circuit unit 32. The functions of the outdoor communication circuit unit 28 and the indoor communication circuit unit 32 are used for wired The data in the wireless mode is transmitted and received. The indoor control unit 29 receives signals from each temperature detection unit 30 and the temperature setting unit 31, so that it can be based on the actual temperature and the preset temperature. The required cooling capacity of each indoor unit 9 is calculated under the difference between them. Each indoor control unit 29 has its own information about the cooling capacity of the indoor unit, so that it can be based on the actual temperature and the The difference between the preset temperature, the cooling capacity data of each indoor control unit 29 to calculate the required cooling capacity of each indoor unit 9 or only based on the cooling capacity data of each indoor control unit 29 The required cooling capacity of each indoor unit 9. If the indoor control unit 29 is only based on its cold -------- 1T --------- line (please read the Precautions to fill out this page)

587143 A7 V. Description of the invention (14) When a required cooling amount is calculated, the cooling amount becomes a required cooling amount. In the application, the cooling amount can be converted into a capadty code. The following data are listed in Table 1 (Table 1). ≪ Table 1 > Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4 Indoor unit 5 Indoor unit 6 Cooling capacity of all units Kcal / hr 6200 3550 2800 2800 1800 1800 18900 Load code 62 35 28 28 18 18 189 (Please read the precautions on the back before filling this page) In Table 1, 'The 6 sets of indoor units are connected to a compressor with a horsepower of 7.5 horsepower, of which The load code is set to a multiple of the cooling amount of each unit in the house. Based on the difference between the actual temperature and the preset temperature, the cooling amount data of each control unit 29 in the house to calculate each unit in the house In the embodiment of the required cooling capacity of 9, the required cooling capacity can be obtained by multiplying the load code in the table by a compensation coefficient, and the compensation coefficient is based on the actual The difference between the predetermined temperature and the set temperature. The compensation coefficient Q / 3 line in FIG. 5 in accordance with the decision. Economic Intellectual Property Office employee printed consumer cooperatives

As shown in Figure 5, the Q value is set based on the difference between the actual temperature and the preset temperature. Even if there is no difference between the actual temperature and the preset temperature, the compensation coefficient when the indoor temperature increases will not be equal to the compensation coefficient when the indoor temperature decreases. If the indoor temperature is higher than the preset temperature and the indoor temperature is decreasing, the Q value is equal to 3. If the temperature inside the room is lower than the preset temperature and the difference between the two is greater than H 18, the paper size of the wood is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm 587143 A7) ---------- V. Description of the invention (15) When the "Q" value is equal to 0, the electronic expansion room 4 must be closed at this time .: Once the electronic expansion valve 4 is closed, it is cold. Then it will not flow to the indoor unit 9. When there is no difference between the indoor temperature and the preset temperature, the electronic expansion point 4 can be turned on. If the indoor temperature continues to increase, and the indoor temperature When the temperature is higher than the preset temperature and the difference between the two is less than rc, the Q value is equal to 2. If the temperature in the house is higher than the preset temperature and the difference between the two is greater than TC, the Q value is Is equal to 3. In the above manner, the required cooling amount of each indoor unit can be transmitted to the outdoor control unit 27 through the outdoor communication circuit unit 28 and the indoor communication circuit unit 32, and by the outdoor control unit 27. Calculated required total cooling capacity (including the required cooling capacity of each indoor unit) The compressor 2 and the PWM valve 26 are controlled. Table 2 (Table 2) indicates the loading time and non-loading time in a 20-second cycle according to the required total cooling capacity. The unloading time is historically set. -------- Order --------- line (please read the notes on the back before filling this page) Staff of the Intellectual Property Bureau of the Ministry of Economic Affairs The paper size printed by the consumer cooperative is applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) 587143

5. Description of the invention (

(Please read the notes on the back before filling this page) < Table 2 >

2

10.4 t Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Figures 6a and 6b show the control method of the air conditioner in the present invention 'The control method will be described below. Please refer to Fig. 6a, the following describes the control sequence in the indoor unit 9. When the indoor unit 9 is turned on (S101), the outdoor control unit 27 makes a determination. If the indoor unit 9 is turned on, the temperature in the house is sensed by the temperature detecting unit 30 (S102). The outdoor control unit 27 senses (S103) the preset temperature via the temperature setting unit 31, so that the difference between the indoor temperature and the preset temperature can be obtained (S104). Subsequently, the outdoor control unit 27 applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) 587143 A7 and the invention description (17) based on the 20 paper sizes (please read the precautions on the back before filling in this (Page) The cooling amount of the indoor unit 9, the difference between the indoor temperature and the preset temperature to calculate (S105) the required cooling amount of the indoor unit, and the cooling of the indoor unit 9 in this step based on the application system The quantity is converted into the capacity code shown in Table 丨. The required cooling capacity of each indoor unit 9 can be obtained by multiplying the load code in Table 1 by the compensation coefficient, which is set based on the difference between the actual temperature and the preset temperature . As mentioned above, the compensation coefficient Q / 3 is determined according to Figure 5. The required cooling amount of each indoor unit obtained by the above calculation method is transmitted to the outdoor control unit 27 via the outdoor communication circuit unit 28 and the indoor communication circuit unit 32 (S106). If the indoor unit 9 is closed in step sioi, the required cooling capacity of the indoor unit 9 is 0 (S107), and this value is transmitted to the indoor unit 9. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs The following will explain the control process of the outdoor control unit 27 in conjunction with Figure 6b. The outdoor control unit 27 is calculated by adding the cooling amounts required for the indoor units 9 (S201). If the required total cooling amount is 0, the outdoor control unit 27 stops the operation of the compressor 2, and if the required total cooling amount is not 0, the compressor 2 continues the operation. If the required total cooling capacity is not 0, the compressor 2 is operated. During the operation of the compressor 2, the outdoor control unit 27 can generate (S204) a duty cycle control signal according to the required total cooling capacity, and can control the duty cycle according to the duty cycle. The opening / closing of the PWM valve 26 is controlled. The working cycle control signal is used to determine the load time and non-load time, and the total cooling capacity required in Table 2 can be used to determine the load time. Non-21 private paper standards are applicable to Chinese national standard (cns) a4. X 297 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives, 587143 A7 --------- B7 V. Description of the invention (18) Load time. Once the load time and non-load time are determined, the outdoor control unit 27 can control (S205) the PWM valve 26 according to the duty cycle control signal. Based on the above sufficient description, it can be known that under the action of the air conditioner control system and the control method of the present invention, the way in which the load of the air conditioner is adjusted by the pulse width modulation compressor is effective for, for example, the air conditioner system, etc. The large-scale cooling load capacity is controlled. By providing each communication circuit unit to the indoor unit and the outdoor unit separately, the calculated required cooling amount of each indoor unit can be transmitted to the outdoor unit, and this method can be effectively applied to Air-conditioning for large buildings with relatively long distances. The required cooling amount is calculated according to each indoor unit, and the calculated required cooling amount is transmitted to the outdoor unit, so that the total cooling required can be effectively obtained under the calculation of the outdoor unit. the amount. The duty cycle of the pulse width modulation compressor can be effectively changed by the duty cycle control signal, wherein the duty cycle control signal is set in advance for the load / non-load time according to the calculated cooling amount. . In addition, in an air conditioner control system using a pulse width modulation compressor, even if the load of the compressor is changed, the motor of the compressor still rotates at a constant speed. This method is different from the Directly control the control method of the variable speed compressor (variaMetrotion number compressor) of the square rotary motor. Therefore, by increasing the life span of the motor and compressor and improving the overall mechanical reliability, when the number of revolutions of the motor is changed, the horse ------ -^ --------- ^ (Please read the Zhuyin on the back? Matters before filling out this page)

丄 43 A7 V. Description of the invention (19) ^^ The system has ideal conditions with ideal control response and no vibration or noise. In addition, since it is not necessary to change the electric / ;, L frequency of the motor, in addition to the control circuit having a simple design structure, the motor can also have a relatively low power consumption. -Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make changes and retouches without departing from the spirit and scope of the present invention. The scope of protection shall be defined by the scope of the patent application attached after the event. Stomach -------- IT --------- (Please read the phonetic on the back? Matters before filling out this page) The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints a moderate size i paper 2¾ 29Γ X 10 2 / VV standard A4 5) N (C quasi-standard country

Claims (1)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 587143 6. Scope of patent application 1. An air conditioner control system, including a compressor, not placed in an outdoor unit and controlled by a pulse width modulation method; condensation A compressor connected to the compressor for fluid flow; a plurality of indoor units it has an evaporator, which is connected to the compressor and the condenser for fluid flow; a plurality of indoor control units for To calculate the required cooling amount of each of the indoor units; and the outdoor control unit to generate a working control signal based on the required cooling amount transmitted by each of the indoor control units, and the outdoor control unit is based on the The operation control signal is used to control the load of the compressor. 2. The air conditioner control system according to item 丨 in the scope of the patent application, wherein each of the indoor units has an indoor communication circuit unit, and the required cooling capacity calculated by each of the indoor control units is transmitted through The indoor communication circuit unit, and the outdoor unit has an outdoor communication circuit unit, and the outdoor communication circuit unit is used to receive data from the indoor communication circuit unit and transmit the data to the outdoor control unit. 3. The air conditioner control system as described in item 1 of the scope of patent application, wherein each of the indoor control units is provided to the corresponding indoor unit, and the outdoor control unit is based on the required cooling capacity. The total value changes the load of the compressor, and the total value of the required cooling amount is obtained by adding the required cooling amounts transmitted by the control units in the houses. 4. The air conditioner control system as described in item 1 of the scope of the patent application, in which 'Early' in the special house has a temperature sensor in the early element system. The temperature sensor system is a 24 U scale standard applicable to Chinese national standards ( CNS) A4 specification (210 X 297 mm) «Order --------- f Please read the precautions on the back before filling out this page) 6. The temperature within the scope of patent application, and The control unit calculates the required cooling based on the record between the temperature in the house and the -preset temperature 50… 5 '. For example, please refer to the air conditioner control system described in item 1 of the patent scope, its I, etc. The indoor unit 70 has a temperature sensor. The temperature sensor is used to sense the indoor air temperature, and each of the indoor control units is based on the measured value between the indoor temperature and the preset temperature. Calculate the required cooling light weight to calculate the cooling capacity of each of these indoor units. 6. The air conditioner control system according to item 5 of the patent application, wherein the required cooling capacity is multiplied by the load The value obtained from the code is a multiple of the compensation balance. The difference between the actual temperature and the preset temperature is set. 7. The air conditioner control system as described in the declared patent scope 帛 6, where 'When the μ temperature increases, the compensation turtle system surplus ## 内 内The compensation coefficient when the temperature decreases. 8. The air conditioner control system as described in item i of the scope of the patent application, wherein the load of the compressor is one of a rigid% load or a 0% load. The air conditioner control system described in the first item of the scope, wherein the units in the house are arranged in parallel with each other. 10. The air conditioner control system described in the first item of the patent scope of the application, where The outdoor unit further includes a pressure accumulator and a collector. The pressure accumulator is a low-pressure duct disposed upstream of the compressor, and the collector is a high-pressure duct disposed downstream of the condenser 3. 11. The air conditioner control system described in item 10 of the scope of patent application, which is printed by A143 B8 C8 D8 of the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. The scope of patent application: 'The outdoor unit also includes a ventilation bypass duct And a vent valve, the vent = bypass guide means that the collector is connected to the upstream of the pressure accumulator and the low-pressure guide is provided on the vent bypass valve. 12. The air conditioner control system as described in item u of the scope of patent application, wherein the low pressure conduit in the " Hai pressure accumulator has a tj-shaped section and will extend from the collector and pass through the pressure accumulator The low-pressure conduit of the device is positioned inside the u-shaped portion passing through the low-pressure conduit. 13. The air conditioner control system according to item 10 of the scope of the patent application, wherein the outdoor unit further includes a hot gas bypass pipe and a hot gas valve. The hot gas bypass pipe is used to locate the A part of the pressure-containing duct between the compressor and the condenser is connected to the pressure accumulator, and the hot gas valve is arranged above the hot gas bypass duct. 14. The air conditioner control system according to item 10 of the scope of the patent application, wherein the outdoor unit further includes a liquid bypass duct and a liquid valve, and the liquid bypass duct is used to connect the collector downstream. Up to the pressure accumulator, the liquid valve is arranged in the middle of the liquid bypass duct. 15 · —A control system for an air conditioner, including: a compressor having two states, the two states are respectively relative to two different loads, and the compressor can be selectively selected among the two states when power is applied; Operate in one state; a condenser connected to the compressor for fluid flow; a plurality of evaporators connected to the compressor and the condenser for fluid flow; a temperature sensor for air conditioning Sensing each room of a room 26 Wood paper scales suitable for wealth 0 National Tsukasa Standard (CNS) A4 specifications ⑵〇xlFi ¥ T 587143 A control sheet 70 calculates the required cooling amount based on the difference between a detected indoor temperature and a preset temperature. The preset temperature is a required indoor temperature for air conditioning of the room. In order to generate a work control signal, a signal, a function of calculating a cooling amount, and controlling the load of the compressor by the preset temperature according to the work control signal. ΦΜ -------- tr --------- line * (Please read the precautions on the back before filling in this page) 16 · Control of air conditioner as described in item 15 of the scope of patent application The system, wherein the load of the compressor is one of a 100/0 load or a 0% load. Π. The air conditioner control system according to item 15 of the scope of patent application, wherein the control unit calculates a required cooling amount based on the cooling amount of the evaporator. 18. The air conditioner control system as described in item 15 of the scope of patent application, in which, the units in the house are arranged in parallel with each other. 19. An air conditioner control system comprising a compressor and a control unit, the compressor is controlled by a pulse width modulation method, the control unit is used to generate a duty cycle control signal, the duty cycle control signal system It is a function of the required cooling capacity transmitted by the units in the house, and the control unit controls the load of the compressor according to the duty cycle control signal. 20 · The air conditioner control system described in item 19 of the scope of patent application, wherein I, the duty cycle control signal is determined to discharge a refrigerant by the compressor I under a load time, and the work The cycle control signal is determined | the refrigerant is not discharged by the compressor at an off-load time. I 21 · The air conditioner control system as described in item 20 of the scope of patent application, where #, the load of the compressor at the load time is 100%, and the compressor is 27 ° This paper size is applicable to China Standard (CNS) A4 specification ⑵0 X 297 public love) '--------, the load is 0% when the patent application scope is at the non-load time. The control method of the adjusting machine, which includes a plurality of width modulation compressor-outdoor single M plural steps:… ## The method of controlling the industrial machine includes the following steps to calculate each of these For each such indoor unit, the required cooling capacity of the indoor unit is controlled; the calculated required cooling capacity is transmitted to the outdoor unit; ... the cooling from each of the indoor units is controlled under the control of the outdoor unit Sum up the quantities; and A generates a work control signal and controls the load of the compressor according to the work control signal, and the jade work control signal is all the required cold functions. = 3. If the scope of application for patent is 22 In the control method of the air conditioner described in the item, in calculating the required cooling amount, the calculation of the required cooling amount of each of the indoor units is based on the cooling amount of each of the indoor units. The method for controlling an air conditioner as described in item 22 of the scope of the patent application, wherein the calculation of the required cooling amount of each of the indoor units is based on the cooling amount of each of the indoor units, a room temperature The difference between the temperature and a preset temperature. The control method of the air conditioner as described in item 24 of the scope of patent application, wherein the required cooling amount of each of the indoor units is multiplied by a load code. One of the obtained values, and the required cooling amount is the cooling amount of each of the indoor units obtained through a compensation coefficient, which is based on the actual A8B8C8D8. 6. The range of the patent application temperature and the preset temperature. 26. The control method of the air conditioner as described in item 25 of the patent scope is warm and medium. When the temperature inside the house increases, the compensation coefficient is greater than when the degree inside the house decreases. 27. According to the control method of the air conditioner described in item 22 of the scope of the patent application, the required cooling amount calculated for each of these cent units is passed through each of the indoor communication circuit units. Transmission to the outdoor communication circuit unit. 28. As described in the scope of application of the printed patent, the control method of the air conditioner described by 22 workers, the second middle school # # ％% 控 麻 韵 is determined by the pressure under the load time- Save for Lai, and (iv) the domain duty cycle signal lines depends on Cloth - under non-load time; ^ by the compressor discharge to the cold (iv). 29. The method of controlling an air conditioner as described in the claim patent scope 28 workers, wherein the load of the compressor at the load time is loud. , And the load of the _ machine at the non-load time is G%. 30 · A control method of industrial air conditioner, the air conditioner includes a pulse wave shrinking machine-an outdoor unit and a plurality of evaporators, these evaporators are in the room for air conditioning, the air conditioner's The control method includes the following steps: For the rooms where air conditioning is performed,-the indoor temperature is sensed; the difference between the indoor temperature and-a preset temperature is obtained, and the preset temperature is for the room to be air-conditioned. -The required indoor temperature; based on the difference to calculate-the required cooling amount; and the work control signal to control the paper size according to the work control signal according to China National Standard 29 587143 Scope of patent application The load control signal of Weinberger shrinking machine is a function of all the required cooling capacity calculated in the above steps. ° 31. The method of controlling an air conditioner as described in item 30 of the scope of the patent application, wherein the calculation of the required cooling amount of each of the indoor units is based on the cooling amount of each of the indoor units, a room temperature and The difference between a preset temperature, the required cooling amount of each of the indoor units is a value obtained by multiplying by a load code, the value is a multiple of a compensation coefficient, and the compensation coefficient is It is set based on the difference between the actual temperature and the preset temperature. 32. The method for controlling an air conditioner as described in item 31 of the scope of patent application, wherein the compensation coefficient when the temperature inside the house increases is larger than the compensation coefficient when the temperature inside the house decreases. -------------------- ^ -------- (Please read the notes on the back before filling out this page) Employees' Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed on 30 papers in accordance with China National Standard (CNS) A4 (21 × 297 mm)